Oil-well tool



Nov. 27, 1923 l w. P. STAMPFLI oIL WELL ToQL Filed March 6. 1922 Panarea Nev. av, reas.,

VVENDEL'L P. STAMPFLI, OF HEALDTON, OXLAHOMA OIL-WELL TOOL.

Application filed March 8, 1922. Serial No..5/l1,386.

To all w/iom t may concern.'

Be it lrnown that I, VVnNnnLL P. S'raarrrLi, a citizen of the United States, and a resident of Healdton, in the county of Carter and State of Oklahoma, have invented a new and useful Improvement in Oil-Well rlools, of which the following is a full, clear, and exact description.

My invention relates to improvements in oil Well tools for removing broken pieces of steel, or the like, which have dropped to the bottom of the oil well, and it consists in the combinations, constructions, and arrangements herein described and claimed.

An object of my invention is to provide an oil well tool which is adapted to automatically grip an object which has become lodged in the well and to raise the same from the well.

A further object of my invention is to provide a device of the type described which may be readily set so as to automatically grip the tool or other like object when it engages with the latter.

further object of my invention is to provide a device of the type described which is simple in construction and which is readily secured to the ordinary type of -section rods, whereby it may be lowered to any desired depth in the well.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a side elevation of the device, portions thereof being broken away,

Figure 2 is aside elevation of a portion of the device taken at right angles to the view shown in Figure 1, and

Figure 3 is a bottom plan view of the device, showing the jaws in Opened position.

In carrying out my invention, l provide a cylinder l'which is substantially the same size as the bore of the well. The cylinder '1 is provided with diametrically opposed lugs 2, to which a pair of jaws 8 are pivotally secured. In Figure 3 of the drawing, I have shown the jaws 3 as being provided with lugs 4, the lugs having alined openings 5 therein and being disposed on the inside and adjacent to the lugs 2. rlhe jaws .3 have openings 6 therein which are adapted to be alined with openings in the lugs 1. The jaws are pivotally secured vto the cylinder 1 by means of pins 7 which are disposed in the alined openings 1 and 5 of the jaws 3 and the lugs 2, respectively. The jaws 3 are preferably'semi-cylindrical in cross section so as to form a contiguous outer surface with the cylinder 1 whenthe jaws are in opened position (see Figure 1). rllhe jaws are adapted to swing from the full line position shown in Figure 1 `to the dotted line position, and are normally held in this position by a means hereinafter described.

A ring 8 is slidably disposed in the lower end of the cylinder 1 and is provided with downwardly projecting lugs 9, which are adapted to engage with the upper edges of the jaws 3. lt will be observed that when the jaws 3 are in opened position, the lugs 9 are prevented from moving downwardly with respect to the jaws by means of projections 10 which are carried by the inner sides of the aws 3, and which, are disposed flush with the top edges of the jaws. The ring S is provided with a nut 11 which is slidably disposed in a slot 12 in the cylinder 1 (see Figures 1 and 2). rlhe nut 11 therefore determines the movement of the ring 8 with respect to the cylinder 1` The jaws 3 are forced from their opened position to the closed position by means of a spring 13 ,which bears against the ring 8 and which is enclosed within ythe cylinder 1.

. The upper end of the spring 13 bears against a disc 14 which is slidably disposed within the cylinder 1, and whicli'is .held by means of a pin 15 in the full line position shown in Fig. 1. The pin 15 is removably disposed within alined openings 16 in the cylinder 1 so that when the pin is removed,.the spring 13 will move the disc 14C upwardly into the dotted line position and thereby permit the free and ready movement of the jaws 3. lt will be apparent that when the jaws arel in opened position, the ring 8 is moved upwardly into the dotted line position shown in Figure 1, and the nut 11 is disposed in the upper end of the slot 12.

The cylinder 1 is carried by a supportl 17 which is screwed into the upper end of the cylinder 1. The support 17 is so fashioned that it may be readily securedl to the lower end of the section rods 18 which are normally used in oil drilling operations.. The connecting means between the rods 18 and l the members 17 may be of any known construction.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. As heretofore stated, the cylinder 1 is substantially the same size as the bore of the oil well into which the cylinder is disposed. When an object, such as a broken piece of steel, or other like object, has become lodged in the well, and it is desired to remove the same, the device is set so it will automatically grip the object when it comes into ccntact therewith. In the setting of the device, the cylinder 1 is removed from the support 17, and the pin is withdrawn so as to permit the jaws 3 to be readily opened. A

, piece of wood, such as that shown at 19, is

disposed between the jaws, and prevents the jaws from resuming normal position. The disc 14: is moved downwardly and the pin 16 is again inserted so as to hold the disc in the full line position. lt will therefore be observed that the spring 13 is under tension and tends to move the jaws into closed position. The aws are serrated at 2O so as to firmly grip an object, such as that shown at 21 in Figure 2, therebetween when they are closed. The cylinder 1* is secured to the support 17, and the support in turn is secured to the section rods 18, whereby the device may be readily lowered into the oil well. The jaws 3 will now conform to the outer wall of the cylinder 1, and it will therefore be apparent that the object within the well will strike the member 19 when the device l`is moved thereby. lNhen the object within the well strikes the member 19, it will dislodge the member and will move it upwardly into the cylinderl, whereupon the jaws 3 will be released and will firmly grasp the object, such as that shown at 21, therebetween. rlhe device may now be removed from the well. The object 21 may now be released from the jaws 3, whereupon the device is ready for any further use if necessary.

From the foregoing, it will be observed that I have provided a simple device which isy adapted to automatically grasp a broken piece of steel, such as a tool or the like, and to carry the broken piece upwardly therewith when the device is removed from the well. The device is readily set for each operation and consists of a minimum of parts.

l claim:

1. A device of the type described comprising a cylinder, a pair of jaws pivotally carried by said cylinder at one end thereof, yieldable means for forcing said jaws together, said jaws being held apart by an object placed therebetween.

2. A device of the type described comprising. a cylinder, a pair of semi-cylindrical jaws adapted to aline with the outer surface of said cylinder when said jaws are in opened position, and yieldable means for swinging said jaws into closed position, said jaws being' adapted to be releasably held in opened position by a spacing member placed therebetween.

3. A device of the type described comprising a cylinder, a pair of jaws pivotaliy carried by said cylinder and being disposed at one end thereof, said jaws being adapted to form a contiguous portion of the cylinder wall when in extended position, a ring slidably disposed in said cylinder and having lugs adapted to abut said aws, a spring carried by said cylinder, and abutting said ring, and means for placing said spring under tension.

4'. A device of the type described comprising a cylindrical casing, a pair of semicylindrical jaws aivotally carried by said casing and being tlisposed at one end thereof, said jaws having serrated inner sides and being adapted to form a contiguous portion of said casing wall, a ring slidably disposed in said casing and having lugs adapted to abut said aws` throughout the entire movement of the latter7 a spring bearing against said ring, a disc abutting the other end of said spring, and a pin removably carried by said casing for placing said spring under tension.

5. A device of the type described comprising a cylinder, a pair of semi-cylindrical jaws pivotally secured to said cylinder and being adapted to align with the outer surface of said cylinder when said jaws are in opened position, and spring pressed lugs yieldingly engaging. with said jaws and being adapted to spring said jaws into closed position.

l/VENDELL P. STAMPFL. 

